CN111155949A - Oil-based drilling cutting treatment method and gas purification device applied to same - Google Patents
Oil-based drilling cutting treatment method and gas purification device applied to same Download PDFInfo
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- CN111155949A CN111155949A CN202010007412.3A CN202010007412A CN111155949A CN 111155949 A CN111155949 A CN 111155949A CN 202010007412 A CN202010007412 A CN 202010007412A CN 111155949 A CN111155949 A CN 111155949A
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- 238000000746 purification Methods 0.000 title claims abstract description 69
- 238000011282 treatment Methods 0.000 title claims abstract description 45
- 238000005520 cutting process Methods 0.000 title claims abstract description 38
- 238000005553 drilling Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 173
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000003546 flue gas Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002351 wastewater Substances 0.000 claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003795 desorption Methods 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 12
- 230000002000 scavenging effect Effects 0.000 claims abstract description 12
- 238000000197 pyrolysis Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000003345 natural gas Substances 0.000 claims abstract description 7
- 238000004064 recycling Methods 0.000 claims abstract description 5
- 238000002309 gasification Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 57
- 238000003860 storage Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 18
- 230000002378 acidificating effect Effects 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 238000001802 infusion Methods 0.000 claims description 7
- 239000002910 solid waste Substances 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000011550 stock solution Substances 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000003672 processing method Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012805 post-processing Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 38
- 238000005507 spraying Methods 0.000 description 14
- 239000000428 dust Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
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- 239000000654 additive Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
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- 238000010297 mechanical methods and process Methods 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
- E21B21/066—Separating solids from drilling fluids with further treatment of the solids, e.g. for disposal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/067—Separating gases from drilling fluids
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to an oil-based drilling cutting processing method and a gas purification device applied to the oil-based drilling cutting processing method, relates to the technical field of oil-based drilling fluid post-processing, and aims to solve the problems of relatively low equipment utilization rate and high cost caused by the existing processing method, wherein the method comprises the steps of S2, feeding drilling cuttings into thermal desorption equipment for pyrolysis processing; s3, condensing and recycling the mixed gas obtained in the step S2 to obtain a water/oil mixture and non-condensable gas; s5, after removing acid gas from the non-condensable gas, sending the mixed natural gas into a combustion chamber of a thermal desorption device for ignition; set up gaseous purifier, the flue gas that the combustion chamber produced and noncondensable gas are sent into gaseous purifier respectively, and gaseous purifier is through the scavenging solution to the gas that gets into and is made purification treatment and utilize the scavenging solution and the new scavenging solution of handling the flue gas to be purification treatment to noncondensable gas, and purification treatment produces acid waste water. The invention can reduce the environmental pollution caused by the discharged gas, improve the equipment rate and reduce the cost.
Description
Technical Field
The invention relates to the technical field of post-treatment of oil-based drilling fluid, in particular to an oil-based drilling cutting treatment method and a gas purification device applied to the oil-based drilling cutting treatment method.
Background
In recent years, with the large-scale exploration and development of shale gas, multilateral wells and horizontal wells are drilled more and more, the problem of well wall stability is more and more prominent, and oil-based mud (oil-based drilling fluid) is widely applied to various drilling platforms.
The oil-based drilling fluid is prepared from oils such as diesel oil or white oil, water, organic clay, an emulsifier, a stabilizer, a filtrate reducer and other additives, and is suitable for drilling operations such as high-clay-content and easily collapsed oil and gas layers, high-temperature and high-pressure deep wells, large-slope directional wells, horizontal wells and the like. However, in the use process of the oil-based drilling fluid, a large amount of oil-containing drill cuttings are generated, wherein the oil-containing drill cuttings comprise complex components such as oils, clay, various chemical treatment agents, weighting materials, dirty oil, sewage, drill cuttings and the like, and have the characteristics of high oil content, a large amount of organic pollutants and the like, so that the oil-containing drill cuttings have great environmental pollution risks, and the oil-containing drill cuttings need to be treated.
Currently, the treatment methods for oil-based drill cuttings are mainly as follows: landfill, reinjection, thermal desorption, incineration, mechanical and biological methods, etc., among which thermal desorption is relatively mature and popular.
Patent publication No. CN 106281395A: a method for processing waste oil-based drill cuttings generated in oilfield drilling operation comprises the following steps,
(1) the closed feeding system of the materials comprises: the material is sent into a sealing chamber of the rotary pyrolysis furnace through a closed pipeline by a slurry pump;
(2) and oxygen-isolating rotary thermal desorption treatment of the material: the materials sequentially enter a front heating chamber, a resolving chamber, an extrusion area and a discharging area in the rotary furnace body through the sealing chamber in the step (1); controlling the temperature of the front heating chamber, the analysis chamber, the extrusion area and the discharge area and the residence time in the front heating chamber and the analysis chamber; the residue generated by the reaction is sent into an extrusion area through a feeder, enters a discharge end through the extrusion area and is output through a screw conveyor;
(3) and treating and recovering pyrolysis steam: pyrolysis steam, which is a product generated after the material is subjected to oxygen-isolated thermal desorption treatment in the step (2), firstly enters a steam-splitting drum, nearly 60% of dust and heavy oil are removed from the steam-splitting drum through gravity separation, and then the steam-splitting drum enters an oil-gas dust remover to further remove the dust in the pyrolysis steam; the steam after most of dust is removed enters a condenser for further condensation and recovery, condensable gas in the steam is recovered, a liquid phase condensed and recovered by the condenser enters an oil-water separator for oil-water separation, separated fuel oil enters an oil recovery storage tank, and separated oily sewage is conveyed to an oily sewage treatment station for treatment and then is reinjected to the ground;
(4) and treating and recycling the non-condensable gas: the non-condensable gas which is not condensed after passing through the condenser is removed by a non-condensable gas purifying device, and is used as fuel together with natural gas through a flame arrester to be ignited by a burner so as to provide a heat source for the rotary pyrolysis furnace;
(5) and flue gas treatment and emission: in the combustion chamber, the flue gas generated by the combustion of the non-condensable gas and the natural gas is firstly subjected to acid gas removal in the flue gas by a wet desulfurization and dust removal system, and finally is subjected to dust removal by a bag-type dust remover and finally reaches the standard and is discharged;
(6) automatic high temperature slag discharging system: and the residues after pyrolysis in the combustion chamber are conveyed to a cooling bin through a cooling elevator by a slag discharging conveyor and are conveyed to a packing system after being cooled.
The above content shows a method for thermal desorption treatment of oil-based drill cuttings, but the treatment of non-condensable gas and flue gas in the oil-based drill cuttings depends on two relatively independent systems, so that the equipment utilization rate is relatively low, and the cost is increased, and therefore, a new technical scheme is provided.
Disclosure of Invention
In view of the defects in the prior art, one of the purposes of the present invention is to provide an oil-based drilling cutting treatment method and a gas purification device applied thereto, which can improve the equipment rate and reduce the cost while reducing the environmental pollution caused by the exhaust gas.
The above object of the present invention is achieved by the following technical solutions:
an oil-based drill cuttings treatment method comprising:
s1, screening the oil-based drill cuttings, and performing re-crushing treatment on the large-particle drill cuttings screened out;
s2, preheating and stirring the screened and re-crushed drill cuttings, and sending the drill cuttings into thermal desorption equipment for pyrolysis treatment to obtain treated solid waste residues and mixed gas;
s3, storing solid waste slag; condensing and recycling the mixed gas to obtain a water/oil mixture and non-condensable gas;
s4, feeding the water/oil mixture into a separator for separation to obtain oil and water;
s5, after removing acid gas from the non-condensable gas, sending the mixed natural gas into a combustion chamber of a thermal desorption device for ignition;
set up gaseous purifier, the flue gas that the combustion chamber produced and noncondensable gas are sent into gaseous purifier respectively, and gaseous purifier is through the scavenging solution to the gas that gets into and is made purification treatment and utilize the scavenging solution and the new scavenging solution of handling the flue gas to be purification treatment to noncondensable gas, and purification treatment produces acid waste water.
By adopting the technical scheme, the same gas purification device is adopted to purify the flue gas and the non-condensable gas respectively in the drilling cutting treatment process, so that the utilization rate of equipment is improved; meanwhile, the purifying liquid which treats the flue gas is adopted to treat the non-condensable gas, so that the utilization rate of the purifying liquid is improved, and the cost for treating the non-condensable gas by adopting the method is relatively lower.
The present invention in a preferred example may be further configured to: the flue gas exchanges heat with the acidic wastewater before being purified, the water in the acidic wastewater is heated and evaporated for concentration, and the concentrated acidic wastewater is stored for reuse.
By adopting the technical scheme, the acidic wastewater generated by purifying the gas can be recycled so as to recover part of the cost, thereby the cost is relatively lower.
The utility model provides a be applied to gas purification device of oil base drill chip processing method, includes the body of the tower, set up the flue gas clean room and the noncondensable gas clean room that are distribution from top to bottom in the body of the tower, be provided with spraying system and its external connection in the flue gas clean room and spray the liquid supply source, the lower part of flue gas clean room is formed with the stock solution chamber that is used for receiving the spray liquid, set up spraying system and its inlet in the noncondensable gas clean room equally and communicate in the stock solution chamber, the noncondensable gas clean room communicates at least and has a drainage pipe, flue gas clean room and noncondensable gas clean room communicate respectively and have the admission line who stretches out the body of the tower, the body of the tower is worn to be equipped.
By adopting the technical scheme, the flue gas is sent into the flue gas purification chamber, the non-condensable gas is sent into the non-condensable gas purification chamber, and the spraying system is started to spray out the purification liquid treatment gas; the purification liquid of the treated flue gas is used for being sprayed into the non-condensable gas purification chamber again, so that the utilization rate of the purification liquid is effectively improved, and the cost is reduced.
The present invention in a preferred example may be further configured to: the spraying system comprises a main pipeline and a plurality of branch pipelines communicated with the main pipeline, the main pipeline is communicated with an infusion pump, a plurality of spray heads are arranged on the branch pipelines, and the spraying system is positioned on the upper portions of the flue gas purification chamber and the noncondensable gas purification chamber.
Through adopting above-mentioned technical scheme, the transfer pump extracts the scavenging solution and sends into the main line, and the scavenging solution flows into the branch pipe from the main line, and the shower nozzle blowout on the rethread branch pipe.
The present invention in a preferred example may be further configured to: the infusion pump is positioned outside the flue gas purification chamber and the non-condensable gas purification chamber.
By adopting the technical scheme, the probability of the infusion pump being corroded and damaged by the acid gas can be reduced.
The present invention in a preferred example may be further configured to: the inner bottom of the liquid storage cavity is fixedly provided with a baffle plate extending upwards, the baffle plate separates the liquid storage cavity to form a non-condensable gas re-purification cavity and a liquid inlet cavity which are transversely arranged, a guide sealing plate is arranged above the liquid storage cavity, the guide sealing plate covers the non-condensable gas re-purification cavity, one side of the guide sealing plate extending to the liquid inlet cavity is bent downwards to form a gas blocking end plate, the height of the lower edge of the gas blocking end plate is lower than that of the upper edge of the baffle plate, and the guide sealing plate is arranged in an inclined mode, and the lower end of the guide sealing plate faces the liquid inlet;
the upper part of the non-condensable gas purifying chamber is communicated with a middle gas feeding mechanism, an exhaust port of the middle gas feeding mechanism is communicated with a non-condensable gas re-purifying cavity, and one side, close to the inclined upper end edge of the guide sealing plate, of the non-condensable gas re-purifying cavity is communicated with a gas outlet pipeline.
By adopting the technical scheme, the non-condensable gas treated in the non-condensable gas purifying chamber is fed into the non-condensable gas re-purifying chamber through the middle gas feeding mechanism; purifying liquid sprayed by a spraying system in the flue gas purifying chamber firstly flows into the liquid inlet cavity and then flows through the baffle plate to enter the noncondensable gas re-purifying cavity; the non-condensable gas entering the non-condensable gas repurifying cavity generates bubbles to float upwards in the purifying liquid and is used as a secondary purifying part; subsequently, because the choke end plate is inserted into the purifying liquid and the lower edge of the choke end plate is lower than the upper edge of the baffle plate, the non-condensable gas entering the non-condensable gas re-purifying cavity is finally discharged from the gas outlet pipeline under the combined action of the guide sealing plate and the purifying liquid.
The present invention in a preferred example may be further configured to: the middle gas supply mechanism comprises a middle pipeline, two ends of the middle pipeline are respectively communicated with the flue gas purification chamber and the noncondensable gas repurification chamber, and a one-way valve matched with the middle pipeline is installed on the middle pipeline.
Through adopting above-mentioned technical scheme, noncondensable gas clean room and noncondensable gas repurification chamber communicate each other through the intermediate conduit, because the setting of check valve, so can prevent that the purifying liquid in the noncondensable gas repurification intracavity from directly flowing into noncondensable gas clean room through the intermediate conduit.
The present invention in a preferred example may be further configured to: one end of the middle pipeline communicated with the noncondensable gas repurifying cavity is fixed and communicated with a plurality of branch pipelines, and the branch pipelines are provided with a plurality of air holes or are communicated with a plurality of aeration discs.
Through adopting above-mentioned technical scheme, the noncondensable gas gets into the produced bubble of noncondensable gas repurification intracavity scavenging solution more relatively and littleer to can effectively improve the repurification effect of noncondensable gas.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the flue gas generated by combustion and the non-condensable gas generated by pyrolysis are purified by the same gas purification device, so that the utilization rate of equipment can be effectively improved;
2. the purified liquid of the treated flue gas is used for treating the non-condensable gas again, so that the utilization rate of the purified liquid can be improved;
3. carrying out secondary purification treatment on the non-condensable gas;
in conclusion, the invention can purify the flue gas and the non-condensable gas, and simultaneously can improve the utilization rate of equipment and reduce the cost.
Drawings
Fig. 1 is a schematic view of the structure of a gas purification apparatus of the present invention.
In the figure, 1, a tower body; 11. a flue gas purification chamber; 12. a noncondensable gas purification chamber; 13. a liquid storage cavity; 131. a noncondensable gas repurification chamber; 132. a liquid inlet cavity; 2. a spray system; 21. a main conduit; 22. branch pipelines; 23. a spray head; 24. an infusion pump; 31. an air intake duct; 32. an air outlet pipe; 33. a liquid discharge conduit; 41. a baffle plate; 42. a guide closing plate; 421. a choke end plate; 5. an intermediate air supply mechanism; 51. an intermediate pipeline; 52. a one-way valve; 53. and (5) dividing pipelines.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
the invention discloses an oil-based drilling cutting treatment method, which comprises the following steps:
s1, screening the oil-based drill cuttings through a vibrating screen, and performing re-crushing treatment on the large-particle drill cuttings screened out through a crusher;
s2, preheating and stirring the screened and re-crushed drill cuttings, and sending the drill cuttings into thermal desorption equipment for pyrolysis treatment to obtain treated solid waste residues and mixed gas;
s3, storing the solid waste slag, and intensively transporting the solid waste slag to a specified area for backfill treatment at a later stage; condensing and recycling the mixed gas to obtain a water/oil mixture and non-condensable gas;
s4, feeding the water/oil mixture into a separator for separation to obtain oil and water;
s5, removing acid gas from the non-condensable gas, feeding the mixed natural gas into a combustion chamber of a thermal desorption device to ignite and generate heat, wherein the heat generated in the combustion chamber is used for heating drill cuttings, for example: heating heat conducting oil or water, then leading the heat conducting oil or water into a heat exchanger, and preheating (heating) the drill cuttings passing through the heat exchanger so as to improve the utilization rate of the non-condensable gas;
in order to reduce the pollution to the environment, improve the utilization rate of equipment and reduce the cost, a gas purification device is arranged, the flue gas and the non-condensable gas generated by a combustion chamber are respectively sent to the gas purification device, the gas purification device performs purification treatment on the entering gas through purification liquid (such as water), and the purification liquid of the treated flue gas and new purification liquid are used for performing purification treatment on the non-condensable gas.
Because the components of the non-condensable gas mainly comprise saturated hydrocarbon, aromatic hydrocarbon, hydrogen, nitrogen, oxygen and acid gas, the non-condensable gas is mixed with natural gas and ignited to generate flue gas after the acid gas is removed, the main components of the non-condensable gas are carbon dioxide, water vapor, a small amount of mixed acid gas and the like, therefore, the water body of the treated flue gas is directly and continuously used for treating the non-condensable gas or is mixed with new water body and then is used for treating the non-condensable gas, and the effect is still better.
According to the arrangement, the flue gas and the non-condensable gas can be purified, so that the environmental pollution is reduced, and meanwhile, the flue gas and the non-condensable gas are treated by using the same gas purifying device, so that the utilization rate of equipment is relatively high; and because the purified water body is recycled, the water consumption can be reduced, so that the use cost of the invention is relatively low.
And discharging the acidic wastewater after the gas purification device works. Before the flue gas is sent into the gas purification device, the acidic wastewater is heated by the heat exchanger, the heated acidic wastewater is sent into a concentration tank, and partial water evaporated in the acidic wastewater is concentrated and then recycled, for example: the acidic concentrated solution is transported to a printing and dyeing mill and a textile mill for neutralizing alkaline waste water, and the treatment mode can save part of the cost for treating the waste water on one hand and recover part of the cost on the other hand.
Example two:
referring to fig. 1, the gas purification apparatus applied to the oil-based drill cutting treatment method disclosed by the present invention includes a tower body 1, wherein a main body of the tower body 1 is columnar and an upper portion thereof is conical. A flue gas purification chamber 11 and a noncondensable gas purification chamber 12 which are distributed up and down are arranged in the tower body 1, and a spraying system 2 is arranged in the flue gas purification chamber 11; the spraying system 2 is fixed on the tower body 1 through a support, and comprises a main pipeline 21 positioned on the upper part of the flue gas purification chamber 11, one end of the main pipeline 21 penetrates out of the tower body 1 and is communicated with a liquid outlet port of an infusion pump 24, the other end of the main pipeline is fixed and is communicated with a plurality of branch pipelines 22 positioned in the flue gas purification chamber 11, the branch pipelines 22 transversely extend and are provided with a plurality of spray heads 23, the spraying directions of the spray heads 23 are downward, and the spray heads 23 preferably spray conical spray heads of conical water mist.
A liquid storage cavity 13 is formed at the lower part of the flue gas purification chamber 11, and water sprayed by the spraying system 2 falls into the liquid storage cavity 13 and is temporarily stored; an evacuation pipe is arranged on the side wall of the liquid storage cavity 13 in a penetrating way, and a valve matched with the evacuation pipe is arranged on the evacuation pipe so as to control the on-off of the evacuation pipe through the evacuation pipe. An air inlet pipeline 31 penetrates through the side part of the tower body 1, an air outlet port of the air inlet pipeline 31 is positioned above the liquid storage cavity 13, and the outer end of the air inlet pipeline 31 is communicated with a smoke outlet of the combustion chamber through a pipeline so as to send smoke into the combustion chamber. An air outlet pipe 32 is fixed on the top of the tower body 1, the air outlet pipe 32 extends upwards, and the lower end of the air outlet pipe is communicated with the flue gas purification chamber 11, so that the treated flue gas is discharged.
The noncondensable gas purification chamber 12 is positioned below the flue gas purification chamber 11, the upper part of the noncondensable gas purification chamber is also provided with the spraying system 2, and the liquid inlet port of the liquid conveying pump 24 of the spraying system 2 is respectively communicated with the liquid storage cavity 13 and a normal water source (municipal pipe network) through two pipelines; the lower side wall of the noncondensable gas purifying chamber 12 is also communicated with an air inlet pipeline 31.
During operation, the spraying system 2 in the noncondensable gas clean room 12 extracts the water in the liquid storage cavity 13 and sprays the water in the noncondensable gas clean room 12 so as to reuse the water in the liquid storage cavity 13 for purification treatment.
The lower part of the noncondensable gas purifying chamber 12 is communicated with a liquid drainage pipeline 33, the liquid drainage pipeline 33 extends out of the tower body 1, and the outer end of the liquid drainage pipeline is provided with a matched valve. When necessary, the worker can open the valve and discharge the waste water generated by spraying and purifying by using the liquid discharge pipeline 33.
The infusion pump 24 is preferably mounted outside the tower 1 to reduce the chance of corrosion damage.
A baffle plate 41 extending upwards is fixed at the inner bottom of the liquid storage cavity 13, and the baffle plate 41 divides the liquid storage cavity 13 to form a non-condensable gas re-purification cavity 131 and a liquid inlet cavity 132 which are transversely arranged.
A guide sealing plate 42 is arranged above the liquid storage cavity 13, and the guide sealing plate 42 is transversely arranged and used for shielding the non-condensable gas right above the re-purification cavity 131; one side of the guiding sealing plate 42 extending to the liquid inlet cavity 132 is bent downwards to form a gas-blocking end plate 421, and the height of the lower edge of the gas-blocking end plate 421 is lower than that of the upper edge of the baffle plate 4; the transverse section of the guide closing plate 42 is disposed obliquely and its lower end faces the liquid inlet chamber 132.
The upper part of the non-condensable gas purifying chamber 12 is communicated with an intermediate air feeding mechanism 5, and an exhaust port of the intermediate air feeding mechanism 5 is communicated with a non-condensable gas re-purifying cavity 131; the upper end of the noncondensable gas repurifying cavity 131 close to the guide closing plate 42 is communicated with an air outlet pipeline 32 penetrating out of the tower body 1.
The working principle of the liquid storage cavity 13 is described as follows according to the height that the water level of the liquid storage cavity is higher than the baffle plate 41: the non-condensable gas treated in the non-condensable gas purifying chamber 12 enters an intermediate gas feeding mechanism 5, the intermediate gas feeding mechanism 5 feeds the non-condensable gas after primary treatment into a non-condensable gas re-purifying cavity 131 to generate bubbles, and the bubbles float and move in a water body in the non-condensable gas re-purifying cavity 131 and then are separated from the water body; because the choke end plate 421 is inserted into water and the guiding sealing plate 42 is arranged at the upper part of the liquid outlet cavity 13, the non-condensable gas moves towards the air outlet pipeline 32 and is separated from the tower body 1 through the air outlet pipeline.
According to the content, the invention can carry out two times of purification treatment on the non-condensable gas, and the more 'clean' water body can be treated with the non-condensable gas at the next time, and the more 'dirty' water body can be used for treating the initial non-condensable gas, so that the purification treatment effect is better, and the water body utilization rate is relatively higher.
The middle air supply mechanism 5 comprises a middle pipeline 51, two ends of the middle pipeline are respectively communicated with the flue gas cleaning chamber 11 and the noncondensable gas repurifying chamber 131, a one-way valve 52 matched with the middle pipeline 51 is installed on the middle pipeline 51, and the conduction direction of the one-way valve 52 is towards the noncondensable gas repurifying chamber 131 of the flue gas cleaning chamber 11. In order to ensure the air supply effect, a Roots blower can be additionally arranged, and the air outlet of the Roots blower is communicated with the air inlet of the middle pipeline 51.
For strengthening the purifying effect of the noncondensable gas repurifying cavity 131, the one end of the middle pipeline 51 communicated with the noncondensable gas repurifying cavity 131 is communicated with a plurality of branch pipelines 53, the branch pipelines 53 transversely extend, and a plurality of air holes or a plurality of aeration discs communicated with the branch pipelines are arranged on the branch pipelines so as to enable bubbles generated in the noncondensable gas repurifying cavity 131 to be smaller and more, thereby improving the purifying effect of the noncondensable gas.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. A method for treating oil-based drilling cuttings comprises the following steps,
s1, screening the oil-based drill cuttings, and performing re-crushing treatment on the large-particle drill cuttings screened out;
s2, preheating and stirring the screened and re-crushed drill cuttings, and sending the drill cuttings into thermal desorption equipment for pyrolysis treatment to obtain treated solid waste residues and mixed gas;
s3, storing solid waste slag; condensing and recycling the mixed gas to obtain a water/oil mixture and non-condensable gas;
s4, feeding the water/oil mixture into a separator for separation to obtain oil and water;
s5, after removing acid gas from the non-condensable gas, sending the mixed natural gas into a combustion chamber of a thermal desorption device for ignition;
the method is characterized in that: set up gaseous purifier, the flue gas that the combustion chamber produced and noncondensable gas are sent into gaseous purifier respectively, and gaseous purifier is through the scavenging solution to the gas that gets into and is made purification treatment and utilize the scavenging solution and the new scavenging solution of handling the flue gas to be purification treatment to noncondensable gas, and purification treatment produces acid waste water.
2. The oil-based drill cuttings treatment method of claim 1, wherein: the flue gas exchanges heat with the acidic wastewater before being purified, the water in the acidic wastewater is heated and evaporated for concentration, and the concentrated acidic wastewater is stored for reuse.
3. A gas purification apparatus applied to the oil-based drill cutting treatment method according to claim 1, characterized in that: including body of the tower (1), set up flue gas clean room (11) and noncondensable gas clean room (12) that are distribution from top to bottom in body of the tower (1), be provided with spray system (2) in flue gas clean room (11) and its outsides spray the liquid supply source, the lower part of flue gas clean room (11) is formed with stock solution chamber (13) that are used for receiving the spray solution, set up spray system (2) and its inlet intercommunication in stock solution chamber (13) equally in noncondensable gas clean room (12), noncondensable gas clean room (12) communicate at least has a drainage tube (33), flue gas clean room (11) and noncondensable gas clean room (12) communicate respectively has admission line (31) that stretch out body of the tower (1), body of the tower (1) is worn to be equipped with two at least outlet duct (32).
4. A gas cleaning device according to claim 3, characterized in that: spray system (2) include main pipe way (21) and communicate in a plurality of branch pipes (22) of main pipe way (21), main pipe way (21) intercommunication has transfer pump (24), be provided with a plurality of shower nozzles (23) on branch pipe way (22), spray system (2) are located the upper portion of gas cleaning room (11) and noncondensable gas clean room (12).
5. The gas purification apparatus according to claim 4, wherein: the infusion pump (24) is positioned outside the flue gas purification chamber (11) and the non-condensable gas purification chamber (12).
6. A gas cleaning device according to claim 3, characterized in that: the inner bottom of the liquid storage cavity (13) is fixed with a baffle plate (41) extending upwards, the baffle plate (41) separates the liquid storage cavity (13) to form a non-condensable gas re-purification cavity (131) and a liquid inlet cavity (132) which are transversely arranged, a guide sealing plate (42) is arranged above the liquid storage cavity (13), the guide sealing plate (42) is shielded right above the non-condensable gas re-purification cavity (131) and one side of the guide sealing plate extending to the liquid inlet cavity (132) is bent downwards to form a gas-blocking end plate (421), the height of the lower edge of the gas-blocking end plate (421) is lower than that of the upper edge of the baffle plate (41), and the guide sealing plate (42) is obliquely arranged and the lower end of the guide sealing plate faces the liquid inlet cavity (;
the upper part of the non-condensable gas purifying chamber (12) is communicated with an intermediate gas feeding mechanism (5), an exhaust port of the intermediate gas feeding mechanism (5) is communicated with a non-condensable gas re-purifying cavity (131), and one side, close to the inclined upper end edge of the guide sealing plate (42), of the non-condensable gas re-purifying cavity (131) is communicated with a gas outlet pipeline (32).
7. The gas purification apparatus according to claim 6, wherein: middle mechanism (5) of supplying gas includes middle pipeline (51) that both ends communicate flue gas clean room (11) and noncondensable gas repurification chamber (131) respectively, install check valve (52) of adaptation on middle pipeline (51).
8. The gas purification apparatus according to claim 7, wherein: one end of the middle pipeline (51) communicated with the non-condensable gas re-purification cavity (131) is fixed and communicated with a plurality of branch pipelines (53), and the branch pipelines (53) are provided with a plurality of air holes or are communicated with a plurality of aeration discs.
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Cited By (1)
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| CN114409210A (en) * | 2022-02-18 | 2022-04-29 | 湖北中油科昊机械制造有限公司 | Uniform mixing's monitorable formula oil base mud processing apparatus |
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